Cubical building element



FIG. 1 is a perspective view of my cubical building element design;

FIG. 2 is a plan view of a face of the cubical building element of FIG. 1, the remaining five faces being identical;

FIG. 3 is a perspective view of an alternate embodiment of my cubical building element design; and,

FIG. 4 a plan view of a face of the cubical building element of FIG. 3, the remaining five faces being identical. 

The ornamental design for a cubical building element, as shown and described. 